/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:31:58,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:31:58,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:31:58,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:31:58,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:31:58,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:31:58,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:31:58,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:31:58,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:31:58,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:31:58,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:31:58,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:31:58,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:31:58,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:31:58,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:31:58,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:31:58,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:31:58,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:31:58,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:31:58,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:31:58,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:31:58,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:31:58,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:31:58,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:31:58,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 01:31:58,092 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 01:31:58,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 01:31:58,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 01:31:58,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 01:31:58,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 01:31:58,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:31:58,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:31:58,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:31:58,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:31:58,125 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:31:58,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:31:58,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:31:58,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:31:58,131 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:31:58,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:31:58,131 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:31:58,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:31:58,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:31:58,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:31:58,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:31:58,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:31:58,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:31:58,133 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:31:58,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:31:58,133 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:31:58,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:31:58,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:31:58,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:31:58,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:31:58,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:31:58,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:31:58,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:31:58,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:31:58,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:31:58,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:31:58,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:31:58,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:31:58,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:31:58,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:31:58,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:31:58,472 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:31:58,475 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:31:58,477 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:31:58,478 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:31:58,478 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 01:31:58,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01cb7d291/e290de78dea84543859584d6ee01ead9/FLAG39675acd7 [2020-08-22 01:31:58,994 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:31:58,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 01:31:59,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01cb7d291/e290de78dea84543859584d6ee01ead9/FLAG39675acd7 [2020-08-22 01:31:59,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/01cb7d291/e290de78dea84543859584d6ee01ead9 [2020-08-22 01:31:59,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:31:59,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:31:59,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:31:59,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:31:59,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:31:59,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22589b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59, skipping insertion in model container [2020-08-22 01:31:59,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:31:59,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:31:59,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:31:59,676 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:31:59,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:31:59,805 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:31:59,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59 WrapperNode [2020-08-22 01:31:59,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:31:59,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:31:59,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:31:59,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:31:59,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (1/1) ... [2020-08-22 01:31:59,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:31:59,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:31:59,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:31:59,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:31:59,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:31:59,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:31:59,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:31:59,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 01:31:59,915 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-22 01:31:59,915 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-22 01:31:59,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:31:59,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:31:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:31:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 01:31:59,916 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-22 01:31:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 01:31:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-22 01:31:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 01:31:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:31:59,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 01:31:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 01:31:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:31:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:32:00,344 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:32:00,344 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-22 01:32:00,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:00 BoogieIcfgContainer [2020-08-22 01:32:00,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:32:00,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:32:00,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:32:00,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:32:00,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:31:59" (1/3) ... [2020-08-22 01:32:00,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a936aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:00, skipping insertion in model container [2020-08-22 01:32:00,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:31:59" (2/3) ... [2020-08-22 01:32:00,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a936aa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:32:00, skipping insertion in model container [2020-08-22 01:32:00,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:32:00" (3/3) ... [2020-08-22 01:32:00,357 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-22 01:32:00,368 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:32:00,376 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:32:00,391 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:32:00,416 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:32:00,416 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:32:00,416 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:32:00,416 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:32:00,416 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:32:00,416 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:32:00,417 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:32:00,417 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:32:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-22 01:32:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 01:32:00,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:00,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:00,443 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:00,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:00,448 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-22 01:32:00,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:00,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772302649] [2020-08-22 01:32:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:00,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:00,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772302649] [2020-08-22 01:32:00,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:00,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:32:00,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215872453] [2020-08-22 01:32:00,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:32:00,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:00,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:32:00,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:32:00,694 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-22 01:32:01,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:01,006 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-22 01:32:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:32:01,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 01:32:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:01,021 INFO L225 Difference]: With dead ends: 150 [2020-08-22 01:32:01,021 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 01:32:01,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:32:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 01:32:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-22 01:32:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 01:32:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-22 01:32:01,084 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-22 01:32:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:01,084 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-22 01:32:01,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:32:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-22 01:32:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 01:32:01,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:01,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:01,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:32:01,087 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:01,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-22 01:32:01,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:01,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974609508] [2020-08-22 01:32:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:01,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:01,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974609508] [2020-08-22 01:32:01,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:01,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:32:01,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063503749] [2020-08-22 01:32:01,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:01,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:01,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:01,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:01,203 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-22 01:32:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:01,619 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-22 01:32:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:32:01,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 01:32:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:01,622 INFO L225 Difference]: With dead ends: 170 [2020-08-22 01:32:01,622 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 01:32:01,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 01:32:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-22 01:32:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 01:32:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-22 01:32:01,638 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-22 01:32:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:01,638 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-22 01:32:01,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-22 01:32:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 01:32:01,639 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:01,639 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:01,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:32:01,640 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:01,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-22 01:32:01,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:01,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715489288] [2020-08-22 01:32:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:01,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:01,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715489288] [2020-08-22 01:32:01,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:01,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:32:01,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972415243] [2020-08-22 01:32:01,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:32:01,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:01,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:32:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:01,718 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-22 01:32:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:02,038 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-22 01:32:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:32:02,039 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-22 01:32:02,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:02,044 INFO L225 Difference]: With dead ends: 203 [2020-08-22 01:32:02,045 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 01:32:02,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 01:32:02,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-22 01:32:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 01:32:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-22 01:32:02,076 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-22 01:32:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:02,076 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-22 01:32:02,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:32:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-22 01:32:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 01:32:02,077 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:02,077 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:02,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:32:02,079 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:02,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-22 01:32:02,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:02,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754476022] [2020-08-22 01:32:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:02,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754476022] [2020-08-22 01:32:02,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:02,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:32:02,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723740463] [2020-08-22 01:32:02,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:32:02,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:32:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:32:02,157 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-22 01:32:02,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:02,571 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-22 01:32:02,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:32:02,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-22 01:32:02,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:02,576 INFO L225 Difference]: With dead ends: 236 [2020-08-22 01:32:02,577 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 01:32:02,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:32:02,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 01:32:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-22 01:32:02,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 01:32:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-22 01:32:02,590 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-22 01:32:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:02,590 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-22 01:32:02,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:32:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-22 01:32:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 01:32:02,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:02,591 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:02,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:32:02,592 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-22 01:32:02,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:02,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501738713] [2020-08-22 01:32:02,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 01:32:02,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501738713] [2020-08-22 01:32:02,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:02,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:32:02,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965468448] [2020-08-22 01:32:02,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:02,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:02,655 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-22 01:32:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:02,775 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-22 01:32:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:32:02,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-22 01:32:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:02,777 INFO L225 Difference]: With dead ends: 116 [2020-08-22 01:32:02,777 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 01:32:02,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 01:32:02,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-22 01:32:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 01:32:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-22 01:32:02,786 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-22 01:32:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:02,786 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-22 01:32:02,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-22 01:32:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 01:32:02,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:02,788 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:02,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:32:02,789 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-22 01:32:02,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:02,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861820606] [2020-08-22 01:32:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 01:32:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:32:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:02,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861820606] [2020-08-22 01:32:02,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:02,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:32:02,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505923696] [2020-08-22 01:32:02,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:32:02,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:02,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:32:02,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:32:02,880 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-22 01:32:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:03,262 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-22 01:32:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:32:03,266 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-22 01:32:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:03,268 INFO L225 Difference]: With dead ends: 223 [2020-08-22 01:32:03,268 INFO L226 Difference]: Without dead ends: 173 [2020-08-22 01:32:03,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:32:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-22 01:32:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-22 01:32:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 01:32:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-22 01:32:03,280 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-22 01:32:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:03,280 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-22 01:32:03,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:32:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-22 01:32:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 01:32:03,282 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:03,282 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:03,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:32:03,282 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-22 01:32:03,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:03,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191203789] [2020-08-22 01:32:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 01:32:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 01:32:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:03,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191203789] [2020-08-22 01:32:03,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:03,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:32:03,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781047437] [2020-08-22 01:32:03,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:32:03,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:03,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:32:03,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:32:03,424 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-22 01:32:03,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:03,853 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-22 01:32:03,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:32:03,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 01:32:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:03,855 INFO L225 Difference]: With dead ends: 246 [2020-08-22 01:32:03,855 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 01:32:03,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:32:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 01:32:03,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-22 01:32:03,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 01:32:03,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-22 01:32:03,870 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-22 01:32:03,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:03,870 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-22 01:32:03,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:32:03,871 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-22 01:32:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 01:32:03,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:03,872 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:03,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:32:03,873 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-22 01:32:03,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:03,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536295300] [2020-08-22 01:32:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:03,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 01:32:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 01:32:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:03,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536295300] [2020-08-22 01:32:03,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:03,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:32:03,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090550457] [2020-08-22 01:32:03,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:32:03,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:03,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:32:03,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:32:03,993 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-22 01:32:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:04,494 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-22 01:32:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:32:04,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-22 01:32:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:04,497 INFO L225 Difference]: With dead ends: 269 [2020-08-22 01:32:04,497 INFO L226 Difference]: Without dead ends: 219 [2020-08-22 01:32:04,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:32:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-22 01:32:04,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-22 01:32:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 01:32:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-22 01:32:04,511 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-22 01:32:04,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:04,511 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-22 01:32:04,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:32:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-22 01:32:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 01:32:04,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:04,513 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:04,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:32:04,513 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-22 01:32:04,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:04,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480992077] [2020-08-22 01:32:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 01:32:04,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:32:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:04,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480992077] [2020-08-22 01:32:04,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:04,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:32:04,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072685595] [2020-08-22 01:32:04,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:32:04,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:04,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:32:04,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:32:04,690 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-22 01:32:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:05,225 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-22 01:32:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:32:05,226 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-22 01:32:05,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:05,228 INFO L225 Difference]: With dead ends: 292 [2020-08-22 01:32:05,229 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 01:32:05,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:32:05,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 01:32:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-22 01:32:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 01:32:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-22 01:32:05,242 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-22 01:32:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:05,242 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-22 01:32:05,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:32:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-22 01:32:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 01:32:05,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:05,244 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:05,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:32:05,244 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-22 01:32:05,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:05,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688023325] [2020-08-22 01:32:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:05,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:32:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:32:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:05,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688023325] [2020-08-22 01:32:05,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:05,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:32:05,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168403446] [2020-08-22 01:32:05,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:32:05,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:05,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:32:05,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:32:05,416 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-22 01:32:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:05,974 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-22 01:32:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:32:05,975 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-22 01:32:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:05,978 INFO L225 Difference]: With dead ends: 315 [2020-08-22 01:32:05,978 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 01:32:05,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:32:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 01:32:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-22 01:32:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 01:32:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-22 01:32:06,003 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-22 01:32:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:06,006 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-22 01:32:06,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:32:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-22 01:32:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 01:32:06,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:06,007 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:06,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:32:06,008 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:06,008 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-22 01:32:06,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:06,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80235896] [2020-08-22 01:32:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:06,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 01:32:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:06,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 01:32:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:06,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80235896] [2020-08-22 01:32:06,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:06,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:32:06,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026266919] [2020-08-22 01:32:06,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:32:06,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:06,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:32:06,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:32:06,186 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-22 01:32:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:06,854 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-22 01:32:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:32:06,854 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-22 01:32:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:06,857 INFO L225 Difference]: With dead ends: 338 [2020-08-22 01:32:06,857 INFO L226 Difference]: Without dead ends: 288 [2020-08-22 01:32:06,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:32:06,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-22 01:32:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-22 01:32:06,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 01:32:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-22 01:32:06,868 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-22 01:32:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:06,868 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-22 01:32:06,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:32:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-22 01:32:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 01:32:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:06,870 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:06,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:32:06,870 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:06,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-22 01:32:06,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:06,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238719930] [2020-08-22 01:32:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 01:32:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 01:32:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:07,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238719930] [2020-08-22 01:32:07,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:07,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:32:07,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45826283] [2020-08-22 01:32:07,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:32:07,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:32:07,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:32:07,031 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-22 01:32:07,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:07,767 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-22 01:32:07,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:32:07,767 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-22 01:32:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:07,770 INFO L225 Difference]: With dead ends: 361 [2020-08-22 01:32:07,770 INFO L226 Difference]: Without dead ends: 311 [2020-08-22 01:32:07,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:32:07,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-22 01:32:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-22 01:32:07,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 01:32:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-22 01:32:07,781 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-22 01:32:07,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:07,781 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-22 01:32:07,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:32:07,781 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-22 01:32:07,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 01:32:07,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:07,783 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:07,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:32:07,783 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-22 01:32:07,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:07,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917865689] [2020-08-22 01:32:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:32:07,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 01:32:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:07,984 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:07,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917865689] [2020-08-22 01:32:07,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:07,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:32:07,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984201065] [2020-08-22 01:32:07,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:32:07,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:32:07,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:32:07,987 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-22 01:32:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:08,770 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-22 01:32:08,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:32:08,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-22 01:32:08,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:08,773 INFO L225 Difference]: With dead ends: 384 [2020-08-22 01:32:08,773 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 01:32:08,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:32:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 01:32:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-22 01:32:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 01:32:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-22 01:32:08,783 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-22 01:32:08,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:08,783 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-22 01:32:08,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:32:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-22 01:32:08,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 01:32:08,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:08,784 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:08,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:32:08,785 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-22 01:32:08,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:08,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114339316] [2020-08-22 01:32:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:08,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:08,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:32:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:08,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 01:32:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:08,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114339316] [2020-08-22 01:32:08,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:08,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:32:08,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382372475] [2020-08-22 01:32:08,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:32:08,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:08,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:32:08,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:32:08,982 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-22 01:32:09,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:09,738 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-22 01:32:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:32:09,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-22 01:32:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:09,742 INFO L225 Difference]: With dead ends: 407 [2020-08-22 01:32:09,742 INFO L226 Difference]: Without dead ends: 357 [2020-08-22 01:32:09,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:32:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-22 01:32:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-22 01:32:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 01:32:09,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-22 01:32:09,753 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-22 01:32:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:09,754 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-22 01:32:09,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:32:09,754 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-22 01:32:09,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 01:32:09,755 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:09,755 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:09,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:32:09,756 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:09,756 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-22 01:32:09,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:09,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393465332] [2020-08-22 01:32:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:09,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:09,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 01:32:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:09,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 01:32:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:09,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393465332] [2020-08-22 01:32:09,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:09,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:32:09,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933897221] [2020-08-22 01:32:09,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:32:09,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:09,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:32:09,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:32:09,973 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-22 01:32:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:11,003 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-22 01:32:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:32:11,004 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-22 01:32:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:11,007 INFO L225 Difference]: With dead ends: 430 [2020-08-22 01:32:11,007 INFO L226 Difference]: Without dead ends: 380 [2020-08-22 01:32:11,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:32:11,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-22 01:32:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-22 01:32:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 01:32:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-22 01:32:11,027 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-22 01:32:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:11,028 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-22 01:32:11,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:32:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-22 01:32:11,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 01:32:11,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:11,029 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:11,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:32:11,030 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:11,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-22 01:32:11,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:11,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129951434] [2020-08-22 01:32:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:11,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:11,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 01:32:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:11,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:32:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:11,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129951434] [2020-08-22 01:32:11,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:11,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:32:11,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354667372] [2020-08-22 01:32:11,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:32:11,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:32:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:32:11,253 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-22 01:32:12,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:12,193 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-22 01:32:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:32:12,194 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-22 01:32:12,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:12,196 INFO L225 Difference]: With dead ends: 453 [2020-08-22 01:32:12,196 INFO L226 Difference]: Without dead ends: 403 [2020-08-22 01:32:12,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:32:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-22 01:32:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-22 01:32:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 01:32:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-22 01:32:12,206 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-22 01:32:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:12,206 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-22 01:32:12,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:32:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-22 01:32:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 01:32:12,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:12,208 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:12,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:32:12,208 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:12,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:12,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-22 01:32:12,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:12,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399855607] [2020-08-22 01:32:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:12,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:12,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 01:32:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:12,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 01:32:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:12,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399855607] [2020-08-22 01:32:12,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:12,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:32:12,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318700758] [2020-08-22 01:32:12,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:32:12,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:12,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:32:12,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:32:12,466 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-22 01:32:13,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:13,522 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-22 01:32:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:32:13,522 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-22 01:32:13,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:13,526 INFO L225 Difference]: With dead ends: 476 [2020-08-22 01:32:13,526 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 01:32:13,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:32:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 01:32:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-22 01:32:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 01:32:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-22 01:32:13,540 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-22 01:32:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:13,540 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-22 01:32:13,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:32:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-22 01:32:13,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 01:32:13,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:13,542 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:13,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:32:13,542 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:13,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:13,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-22 01:32:13,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:13,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584924440] [2020-08-22 01:32:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:13,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:13,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 01:32:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:13,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 01:32:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:13,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584924440] [2020-08-22 01:32:13,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:13,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:32:13,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946461313] [2020-08-22 01:32:13,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:32:13,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:13,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:32:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:32:13,777 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-22 01:32:14,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:14,884 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-22 01:32:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:32:14,884 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-22 01:32:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:14,887 INFO L225 Difference]: With dead ends: 499 [2020-08-22 01:32:14,888 INFO L226 Difference]: Without dead ends: 449 [2020-08-22 01:32:14,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:32:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-22 01:32:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-22 01:32:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 01:32:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-22 01:32:14,899 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-22 01:32:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:14,899 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-22 01:32:14,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:32:14,900 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-22 01:32:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 01:32:14,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:14,900 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:14,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:32:14,901 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-22 01:32:14,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:14,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457677973] [2020-08-22 01:32:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:15,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:15,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 01:32:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:15,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 01:32:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:15,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457677973] [2020-08-22 01:32:15,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:15,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:32:15,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597750157] [2020-08-22 01:32:15,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:32:15,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:15,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:32:15,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:32:15,194 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-22 01:32:16,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:16,505 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-22 01:32:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:32:16,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-22 01:32:16,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:16,511 INFO L225 Difference]: With dead ends: 522 [2020-08-22 01:32:16,511 INFO L226 Difference]: Without dead ends: 472 [2020-08-22 01:32:16,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:32:16,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-22 01:32:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-22 01:32:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 01:32:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-22 01:32:16,527 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-22 01:32:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:16,527 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-22 01:32:16,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:32:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-22 01:32:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 01:32:16,529 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:16,529 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:16,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:32:16,530 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-22 01:32:16,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:16,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325255950] [2020-08-22 01:32:16,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:16,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:16,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:32:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:16,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 01:32:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:16,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325255950] [2020-08-22 01:32:16,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:16,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:32:16,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783487832] [2020-08-22 01:32:16,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:32:16,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:16,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:32:16,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:32:16,860 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-22 01:32:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:18,190 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-22 01:32:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:32:18,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-22 01:32:18,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:18,195 INFO L225 Difference]: With dead ends: 545 [2020-08-22 01:32:18,195 INFO L226 Difference]: Without dead ends: 495 [2020-08-22 01:32:18,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:32:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-22 01:32:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-22 01:32:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 01:32:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-22 01:32:18,209 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-22 01:32:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:18,210 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-22 01:32:18,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:32:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-22 01:32:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 01:32:18,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:18,211 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:18,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:32:18,211 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:18,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-22 01:32:18,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:18,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891672653] [2020-08-22 01:32:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:18,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:18,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 01:32:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:18,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 01:32:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:18,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891672653] [2020-08-22 01:32:18,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:18,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:32:18,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620111659] [2020-08-22 01:32:18,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:32:18,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:18,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:32:18,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:32:18,545 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-22 01:32:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:19,760 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-22 01:32:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 01:32:19,761 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-22 01:32:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:19,764 INFO L225 Difference]: With dead ends: 568 [2020-08-22 01:32:19,765 INFO L226 Difference]: Without dead ends: 518 [2020-08-22 01:32:19,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:32:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-22 01:32:19,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-22 01:32:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 01:32:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-22 01:32:19,813 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-22 01:32:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:19,814 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-22 01:32:19,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:32:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-22 01:32:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 01:32:19,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:19,815 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:19,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:32:19,815 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-22 01:32:19,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:19,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658301436] [2020-08-22 01:32:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:20,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:20,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 01:32:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:32:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:20,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658301436] [2020-08-22 01:32:20,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:20,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:32:20,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562121403] [2020-08-22 01:32:20,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:32:20,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:20,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:32:20,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:32:20,226 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-22 01:32:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:21,452 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-22 01:32:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:32:21,454 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-22 01:32:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:21,457 INFO L225 Difference]: With dead ends: 591 [2020-08-22 01:32:21,458 INFO L226 Difference]: Without dead ends: 541 [2020-08-22 01:32:21,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:32:21,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-22 01:32:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-22 01:32:21,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 01:32:21,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-22 01:32:21,469 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-22 01:32:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:21,470 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-22 01:32:21,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:32:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-22 01:32:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 01:32:21,471 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:21,471 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:21,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:32:21,471 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-22 01:32:21,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:21,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379005558] [2020-08-22 01:32:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:21,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:21,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 01:32:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:21,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 01:32:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:21,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379005558] [2020-08-22 01:32:21,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:21,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:32:21,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637218621] [2020-08-22 01:32:21,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:32:21,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:32:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:32:21,959 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-22 01:32:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:23,302 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-22 01:32:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:32:23,303 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-22 01:32:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:23,306 INFO L225 Difference]: With dead ends: 614 [2020-08-22 01:32:23,306 INFO L226 Difference]: Without dead ends: 564 [2020-08-22 01:32:23,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:32:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-22 01:32:23,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-22 01:32:23,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 01:32:23,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-22 01:32:23,318 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-22 01:32:23,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:23,319 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-22 01:32:23,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:32:23,319 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-22 01:32:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 01:32:23,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:23,320 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:23,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:32:23,320 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-22 01:32:23,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:23,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152215065] [2020-08-22 01:32:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:23,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 01:32:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:23,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 01:32:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:23,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152215065] [2020-08-22 01:32:23,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:23,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:32:23,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504626935] [2020-08-22 01:32:23,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:32:23,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:23,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:32:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:32:23,770 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-22 01:32:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:25,380 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-22 01:32:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 01:32:25,381 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-22 01:32:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:25,384 INFO L225 Difference]: With dead ends: 637 [2020-08-22 01:32:25,384 INFO L226 Difference]: Without dead ends: 587 [2020-08-22 01:32:25,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:32:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-22 01:32:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-22 01:32:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 01:32:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-22 01:32:25,397 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-22 01:32:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:25,397 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-22 01:32:25,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:32:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-22 01:32:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 01:32:25,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:25,398 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:25,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:32:25,399 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:25,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-22 01:32:25,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:25,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429608114] [2020-08-22 01:32:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:25,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:25,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:25,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 01:32:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:25,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:32:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:25,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429608114] [2020-08-22 01:32:25,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:25,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 01:32:25,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829658171] [2020-08-22 01:32:25,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 01:32:25,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 01:32:25,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:32:25,813 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-22 01:32:27,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:27,635 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-22 01:32:27,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 01:32:27,636 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 01:32:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:27,639 INFO L225 Difference]: With dead ends: 660 [2020-08-22 01:32:27,639 INFO L226 Difference]: Without dead ends: 610 [2020-08-22 01:32:27,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:32:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-22 01:32:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-22 01:32:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 01:32:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-22 01:32:27,649 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-22 01:32:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:27,650 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-22 01:32:27,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 01:32:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-22 01:32:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 01:32:27,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:27,651 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:27,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:32:27,651 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-22 01:32:27,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:27,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010514287] [2020-08-22 01:32:27,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:28,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:28,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:32:28,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:28,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 01:32:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:28,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010514287] [2020-08-22 01:32:28,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:28,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 01:32:28,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590405357] [2020-08-22 01:32:28,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 01:32:28,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:28,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 01:32:28,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-22 01:32:28,112 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-22 01:32:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:30,137 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-22 01:32:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 01:32:30,138 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-22 01:32:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:30,143 INFO L225 Difference]: With dead ends: 683 [2020-08-22 01:32:30,143 INFO L226 Difference]: Without dead ends: 633 [2020-08-22 01:32:30,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:32:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-22 01:32:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-22 01:32:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 01:32:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-22 01:32:30,159 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-22 01:32:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:30,160 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-22 01:32:30,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 01:32:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-22 01:32:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 01:32:30,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:30,162 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:30,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:32:30,162 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-22 01:32:30,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:30,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547184970] [2020-08-22 01:32:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:30,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:30,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 01:32:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:30,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 01:32:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:30,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547184970] [2020-08-22 01:32:30,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:30,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 01:32:30,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101471174] [2020-08-22 01:32:30,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 01:32:30,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:30,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 01:32:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-22 01:32:30,821 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-22 01:32:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:33,635 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-22 01:32:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 01:32:33,636 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-22 01:32:33,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:33,641 INFO L225 Difference]: With dead ends: 706 [2020-08-22 01:32:33,641 INFO L226 Difference]: Without dead ends: 656 [2020-08-22 01:32:33,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:32:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-22 01:32:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-22 01:32:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 01:32:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-22 01:32:33,661 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-22 01:32:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:33,661 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-22 01:32:33,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 01:32:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-22 01:32:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 01:32:33,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:33,663 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:33,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 01:32:33,664 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-22 01:32:33,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:33,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449071504] [2020-08-22 01:32:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:34,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:34,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 01:32:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:34,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:32:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:34,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449071504] [2020-08-22 01:32:34,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:34,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 01:32:34,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832299131] [2020-08-22 01:32:34,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 01:32:34,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:34,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 01:32:34,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-22 01:32:34,197 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-22 01:32:36,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:36,419 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-22 01:32:36,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 01:32:36,420 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-22 01:32:36,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:36,422 INFO L225 Difference]: With dead ends: 729 [2020-08-22 01:32:36,423 INFO L226 Difference]: Without dead ends: 679 [2020-08-22 01:32:36,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 01:32:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-22 01:32:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-22 01:32:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 01:32:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-22 01:32:36,434 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-22 01:32:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:36,434 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-22 01:32:36,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 01:32:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-22 01:32:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 01:32:36,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:36,435 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:36,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 01:32:36,436 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:36,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-22 01:32:36,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:36,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985083817] [2020-08-22 01:32:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:36,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:36,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:32:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:37,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 01:32:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 01:32:37,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985083817] [2020-08-22 01:32:37,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:37,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 01:32:37,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578541007] [2020-08-22 01:32:37,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 01:32:37,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 01:32:37,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-22 01:32:37,047 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-22 01:32:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:38,902 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-22 01:32:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 01:32:38,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-22 01:32:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:38,907 INFO L225 Difference]: With dead ends: 752 [2020-08-22 01:32:38,907 INFO L226 Difference]: Without dead ends: 702 [2020-08-22 01:32:38,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 01:32:38,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-22 01:32:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-22 01:32:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 01:32:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-22 01:32:38,919 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-22 01:32:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:38,920 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-22 01:32:38,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 01:32:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-22 01:32:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 01:32:38,921 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:38,921 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:38,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 01:32:38,921 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:38,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:38,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-22 01:32:38,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:38,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001459544] [2020-08-22 01:32:38,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:38,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:38,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 01:32:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:38,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 01:32:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-22 01:32:38,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001459544] [2020-08-22 01:32:38,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:38,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 01:32:38,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410859448] [2020-08-22 01:32:38,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:32:38,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:38,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:32:38,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:32:38,992 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-22 01:32:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:39,142 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-22 01:32:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:32:39,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-22 01:32:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:39,145 INFO L225 Difference]: With dead ends: 177 [2020-08-22 01:32:39,146 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 01:32:39,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 01:32:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-22 01:32:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 01:32:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-22 01:32:39,151 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-22 01:32:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:39,152 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-22 01:32:39,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:32:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-22 01:32:39,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 01:32:39,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:39,153 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:39,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 01:32:39,153 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:39,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-22 01:32:39,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:39,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62605254] [2020-08-22 01:32:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 01:32:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 01:32:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-22 01:32:39,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62605254] [2020-08-22 01:32:39,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:32:39,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:32:39,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331522525] [2020-08-22 01:32:39,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:32:39,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:39,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:32:39,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:39,225 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-22 01:32:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:39,402 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-22 01:32:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:32:39,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-22 01:32:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:39,404 INFO L225 Difference]: With dead ends: 200 [2020-08-22 01:32:39,404 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 01:32:39,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:32:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 01:32:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-22 01:32:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 01:32:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-22 01:32:39,410 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-22 01:32:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:39,410 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-22 01:32:39,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:32:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-22 01:32:39,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 01:32:39,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:39,411 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:39,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 01:32:39,412 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-22 01:32:39,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:39,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287919862] [2020-08-22 01:32:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:32:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 01:32:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-22 01:32:39,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287919862] [2020-08-22 01:32:39,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:39,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:32:39,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308387788] [2020-08-22 01:32:39,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:32:39,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:32:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:32:39,502 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-22 01:32:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:39,656 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-22 01:32:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:32:39,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-22 01:32:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:39,657 INFO L225 Difference]: With dead ends: 187 [2020-08-22 01:32:39,657 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 01:32:39,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:32:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 01:32:39,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-22 01:32:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 01:32:39,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-22 01:32:39,671 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-22 01:32:39,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:39,672 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-22 01:32:39,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:32:39,672 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-22 01:32:39,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 01:32:39,673 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:32:39,673 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:32:39,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 01:32:39,673 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:32:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:32:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-22 01:32:39,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:32:39,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128603840] [2020-08-22 01:32:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:32:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:32:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:32:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 01:32:39,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:32:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-22 01:32:39,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128603840] [2020-08-22 01:32:39,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:32:39,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 01:32:39,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330203690] [2020-08-22 01:32:39,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:32:39,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:32:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:32:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:32:39,796 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-22 01:32:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:32:39,935 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-22 01:32:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:32:39,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-22 01:32:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:32:39,936 INFO L225 Difference]: With dead ends: 157 [2020-08-22 01:32:39,936 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 01:32:39,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:32:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 01:32:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 01:32:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 01:32:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 01:32:39,937 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-22 01:32:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:32:39,938 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 01:32:39,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:32:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 01:32:39,938 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 01:32:39,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 01:32:39,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 01:32:40,166 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-22 01:32:40,167 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-22 01:32:40,167 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-22 01:32:40,167 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-22 01:32:40,167 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-22 01:32:40,167 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-22 01:32:40,167 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-22 01:32:40,168 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 01:32:40,168 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-22 01:32:40,168 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:32:40,168 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-22 01:32:40,168 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-22 01:32:40,168 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-22 01:32:40,168 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 01:32:40,168 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 01:32:40,168 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 01:32:40,169 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 01:32:40,169 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-22 01:32:40,169 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-22 01:32:40,169 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-22 01:32:40,169 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-22 01:32:40,169 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 01:32:40,169 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-22 01:32:40,169 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 01:32:40,170 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-22 01:32:40,170 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-22 01:32:40,170 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 01:32:40,170 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-22 01:32:40,170 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-22 01:32:40,170 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-22 01:32:40,170 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-22 01:32:40,170 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-22 01:32:40,171 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-22 01:32:40,171 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-22 01:32:40,171 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-22 01:32:40,171 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-22 01:32:40,171 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-22 01:32:40,171 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-22 01:32:40,171 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-22 01:32:40,172 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-22 01:32:40,172 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-22 01:32:40,172 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-22 01:32:40,172 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 01:32:40,172 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-22 01:32:40,172 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 01:32:40,172 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-22 01:32:40,173 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-22 01:32:40,173 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-22 01:32:40,173 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-22 01:32:40,173 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 01:32:40,173 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-22 01:32:40,173 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-22 01:32:40,173 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-22 01:32:40,173 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-22 01:32:40,174 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-22 01:32:40,174 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-22 01:32:40,174 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-22 01:32:40,174 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-22 01:32:40,174 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-22 01:32:40,174 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-22 01:32:40,174 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-22 01:32:40,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 01:32:40 BoogieIcfgContainer [2020-08-22 01:32:40,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 01:32:40,199 INFO L168 Benchmark]: Toolchain (without parser) took 40776.21 ms. Allocated memory was 140.0 MB in the beginning and 479.2 MB in the end (delta: 339.2 MB). Free memory was 102.5 MB in the beginning and 343.1 MB in the end (delta: -240.6 MB). Peak memory consumption was 98.6 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:40,199 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 01:32:40,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.93 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.3 MB in the beginning and 181.2 MB in the end (delta: -78.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:40,200 INFO L168 Benchmark]: Boogie Preprocessor took 43.83 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 178.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:40,201 INFO L168 Benchmark]: RCFGBuilder took 498.72 ms. Allocated memory is still 202.4 MB. Free memory was 178.8 MB in the beginning and 155.1 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:40,202 INFO L168 Benchmark]: TraceAbstraction took 39845.59 ms. Allocated memory was 202.4 MB in the beginning and 479.2 MB in the end (delta: 276.8 MB). Free memory was 154.5 MB in the beginning and 343.1 MB in the end (delta: -188.6 MB). Peak memory consumption was 88.2 MB. Max. memory is 7.1 GB. [2020-08-22 01:32:40,204 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 382.93 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 102.3 MB in the beginning and 181.2 MB in the end (delta: -78.8 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.83 ms. Allocated memory is still 202.4 MB. Free memory was 181.2 MB in the beginning and 178.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 498.72 ms. Allocated memory is still 202.4 MB. Free memory was 178.8 MB in the beginning and 155.1 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39845.59 ms. Allocated memory was 202.4 MB in the beginning and 479.2 MB in the end (delta: 276.8 MB). Free memory was 154.5 MB in the beginning and 343.1 MB in the end (delta: -188.6 MB). Peak memory consumption was 88.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 39.5s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...